Drag-saw mechanism.



W. L. HURLEY DRAG SAW MECHANISM.

APPLIGATMN FILED AUG.27, 1913.

Patented Sept. 15, 1914.

2 SHEETS-SHEET 1.

Witnesses Attorneys.

HIE NORRIS PETERS 00., F'HO W. L. HURLEY. DRAG SAW MEGHANISM.APPLICATION FILED AUG. 27, 1913.

1,110,789. Patented Sept. 15, 1914.

2 SHEETS-SHEET 2.

{HF W I K5 w w I s w g y k) H H IUHMM \b 0* vi: M i w w w x R W3 -K i mbe Mi 1mm} Z b g R i t QS W/ZJYZZWZ y Inventor,

Witnesses W by t E B- i f Attorneys.

1 To all whom it may concern:

UNIrEDstrAtrns PATENT oFmoE.

, WILLIAM L. ,nUnLnY, F svniisnmonneon.

DRAG-SAW MECHANISM. f

Specification of Letters Patent. Patentedsept 1914 Application filedAugust 27, 1913. Serial No. 786,948.

Be it known that 1, WILLIAM L. TTURLllY,

a citizen of the United States, residing at Svense'n, in the county ofClatsop and State 1 of Oregon, have invented a new and useful Drag-Sawll lechanism, of which the followmg is a specification.

The present invention appertains to drag saws, and relates moreparticularly to a mechanism for actuating the drag saw.

It is the object of the present nvention to provlde a novel and improvedapparatus for.

. actuating a common cross out saw, for severing or cutting logs or'thelike.

Another object of the present invention 1s to provide novel means forguiding the cross cut saw, whereby the saw will be prevented frombuckling or flexing. j v

A further object of the present invention is toprovide novel means forspring pressing the saw in order that it may'yieldingly engage the log,or within the kerf or slot cut in the log.

J 0 With the foregoing. general Objects} i will be apparent as thenature Of the inven lined and with other objects in view, which tion isbetter understood, the present inven tion resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed. and claimed, it being understood ,th at changes in theprecise embodiment of the invention herein disclosed can be made withinthe scope of what is claimed without departing from the spirit of theinvention. I The invention has been illustrated in its preferredembodiment in the accompanying drawings, wherein y I Figure 1 is a sideelevation ofthe apparatus,part of the saw being broken off, and aportionof the steam engine being shown in longitudinal section. .Fig. 2is a plan view of the parts depicted in Fig. 1. Fig. 3

is an enlarged fragmental detail of the cross 45.

cylinder, as will be apparent, and having the upstanding steam chest 3inclosing the sliding valve 4. The valve 1 is of the usual type, andcontrols the steam passages extending from the steam chest 3 to the endportions of the cylinder 1, as usual. The usual piston head 6workswithin thecylinder 1 and has a relatively long stroke, the

piston rod(extending from the head 6 throughthe head 8 attached to theforward or outer end of the cylinder 1. The head 8 carries an upstandingbracket 9 through which theouter or free end of thevalve stem 5 isguided. The valve gear is carried "by an upstanding arm orbracket 10carried by the forward head 8 of the cylinder, and includes a lever 11fulcrumed to the arm or support 10, a link 12 connecting the lower armof the lever 11 and the intermediate it portion of the valve stem .5,whereby the rocking motion of the lever 11 will impart a reciprocatoryor rectilinear motion to the valve stem. The link 12 is connected tothe.

valve stem 5 by means of a suitable clamp 12,. The upper arm of thelever .11 is equippedwith a pair of spaced earsor lugs 18 carrying thestop screws 14, a lever 15 also being fulcrumed to the support 10. and

having a block or projection 16 extending from one side and workingbetweenthe ears 13 of the lever 11. Thus when the actuating lever 15 isswung to the, ends ,ofits strokes, the block 16 in contacting with therespective stop screws 14, will throw the valve lever 11 properly, so asto slide the the axis of the cylinder, the forward or free ends ofthebars 17 being connectedby a yoke 18 of inverted Ushape. Thebars 17are spaced only slightly apart, so as to receive a common cross cut sawtherebetween.

A cross head 19 is attached to the forward or outer end of the pistonrod 7 to move along the upper edges of the guide bars 17 and has aforwardly projecting fork embodying the arms 20 disposed slidably uponthe upper edges of the guide bars 17. The cross cut saw 21 is disposedsnugly between the guide bars 17 under the yoke 18 and has its rear orinner end fitting within thearms 20 of the cross head fork, and.fulcrumed therebetween by means of a pivot pin. or,

rivet 22 passed through the ends of the arms v cation along the sawguide.

and through thesaw. It is evident that the bars 17 will not only serveto guid the saw, but will also servel'to guidethe cross head carryingthe saw.

Shoes 23 are carried by the arm-s 20 and slidably engage the loweredgesof the guide bars-31117,- the shoes being-carried by the straps or webs2a dependingifron'i tlleifork arms and slidably engaging the remotesidesof the guide bars. It is evident that the shoes 23 working underneaththe saw guidefwill properly guide the cross head for recipro- Oheof thearms 20 is provided with an upstanding arm or extension 25 to which jcneend of a link 26 is pivoted, the other end ofthe link 26 beingpivoted to the upper or l, hereinafter appear. 4 0

free endof-the actuating lever 15, whereby the a etuating lever'l5 willbe oscillated as 1 the cross head is reciprocated with the pisrear ofthesaw, and is provided with a fork or angular bifurcated portion 28straddling the rear fupper corner ofthe saw, and fulcruiiied thereto bymeansof a pin or rivet 29. The free or forward end vof the lever 27 isprovided "with .an angular or depending ',bifurcated'portion or fork 3Oengaging over the uppered'ge of the saw, to lock the lever 27' againstlateral or sidewise movement; The lever 27 carries a jam screw 31adjoining its free end,or adjoining the angular portion 30, engaging theedge of the saw, and the jam screw 31 engages the upper edge of the'safwfor the purposes which will v A leaf spring 321s secured upon the lever2-7 and has its free end resting upon the cross head 19, the leaf spring32tending to depress the saw, and the tension ofythespring beingregulated by the jam screw 31'; I i

In Loperatiomthe apparatus is supported 'in f n suitable manner, bymeans ofthe -.clarnp 2, in order that the saw 21 may en- ,gage a flog'orother object to be cut as is well understood in 'the art. Then, as thesteam orfluid pressure is admitted into the j steam. chest 8, the samewillbe directed to the proper end of the cylinder 1. Supposingftheapparatus to be started with the.

partsarranged. as illustrated in Fig. 1,

{the piston rod willlfirst'be forced forwardly or outwardly so as tocarry the saw for wardly over the log, and at the same time,

"the lever-15 will be swung forwardly throughthe mediuinof the link 26connected to the cross head. After the piston rod has reached theforward vend of its stroke,

"the "block 1,6will have engaged the forward stop screw 14', so as toswing the valve lever 11' in sucha direction as to reverse the positi not the $1 9. 9 a ve 4, wh by t e pi As a'meansfor yieldingly depressingthe: Q saw, a lever 27 1s positioned over the upper or nactlve edge ofthe saw at the lnner or sure.

ten 6 will b amaiaaaaai The piston being forced rearwardly will causethe saw "21 to be draggedback over the log, and as the piston rodreaches the end of itsrear ward stroke the lever 15 Wlll agaln throw orswing the valve lever 11 to correspondingly throw the slide valve 4: forchanging the course of the steam, as is obvious. Thus, as the aboveoperation is continued, the saw will be alternately pushed and draggedover thelogih Upon thejoutwand or forward movement ,of the saw, the sameis adapted to yield so as to clear the saw dust in theslot of the logcut by the saw, and

during the return or drag movement of the saw, the same will workits wayinto and through the log.

From the foregoing, taken in connection with the 'drawings, theadvantages incident to. the present structure will be apparent to thosefamiliar with the art, particular attention being'directed to the factthat. the present apparatus is so designed that it will permit of theemployment of a common cross cut 'saw without the liability of the sawbuckling orflexing under the fluid pres- "The present apparatus isalight andportable one, and carries out the objects aimed at in asatisfactory manner. I

H'aving thus described the invention,what 'is claimed as new 1s:

l. In a device of the characterdescribed, a guide, a cross "head workingupon" the guide, a saw fulcrumed to the cross head and working withinthe guide, and. a leaf,

"spring cotiperating with the upper edge of ioo the saw and the top ofthe cross head for yieldingly depressing the'saw. v 2. Ina device of thecharacter described, a guide, a cross head ,working therealong, a

"saw fulcrumed to the cross head and working withinthe guide, anadjustable member mounted upon the inactive edge of the saw and aleafspring carried by the said member. and having its free end engagingthe cross head to yieldingly depress the saw.

3 3LLIn a'device of the character described,

a guide, a cross head working therealong, a

sawfulcrumedto the cross head and workvsaw fulcrumed to the cross headand work-f ing within theguide, a lever having a bifur- "cated portionat one end straddling the inactive edge of the saw and fulcrunied to thesaw and having a bifurcated portion at its.

.free n st add ing theseedge .01 thesaw,

a leaf spring secured to the lever and having its free end engaging thecross head, and a jam screw carried by the lever and engaging the saidedge of-the saw.

5. In a device of the character described, a body, a pair of parallelguide bars carried thereby and projecting therefrom, a reciprocatorymember carried by the body and hav ing a cross head movable along theupper edges of the guide bars, the cross head having a fork whose armsare slidable upon the upper edges of the guide bars,'the fork armshaving depending webs slidably engaging the remote sides of the guidebars, and the webs having shoes engaging the lower edges of the guidebars, a yoke connecting the free ends of the guide bars, and a saw disposed snugly between the guide bars and having one end pivoted betweenthe said I fork arms.

WILLIAM L. HURLEY.

WVitnesses ELMER A. Con, CONRAD A. NORDLUND."

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

